Comportamiento a fractura de dos aceros de ultraalto contenido en carbono

A. Fernández-Vicente; J. Chao; F. Peñalba; M. Carsí; O. A. Ruano

doi:10.3989/revmetalm.2001.v37.i2.501

Fracture behavior of two ultrahigh carbon steels

Authors

A. Fernández-Vicente Centro Nacional de Investigaciones Metalúrgicas, CSIC. Madrid
J. Chao Centro Nacional de Investigaciones Metalúrgicas, CSIC. Madrid
F. Peñalba Fundación INASMET San Sebastián, Guipúzcoa.
M. Carsí Centro Nacional de Investigaciones Metalúrgicas, CSIC. Madrid
O. A. Ruano Centro Nacional de Investigaciones Metalúrgicas, CSIC. Madrid

DOI:

https://doi.org/10.3989/revmetalm.2001.v37.i2.501

Keywords:

UHC steels, Barker fracture test, Toughness, Crack growth behavior, Carbide size, Elastic energy,

Abstract

Two ultrahigh carbon steels containing 1.3 and 1.5 pet carbon have been tested for their plane-strain (Chevron-notch) fracture toughness using Barker tests. The microstructure of these two materials consisted of fine carbides dispersed in a ferrite matrix. Fracture toughness of UHC-1.3 C was twice that of UHC-1.5 C. This result can be readily explained by means of the difference in size of the carbide particles found in each microstructure. The crack growth mechanism consisted of ductile tearing at the notch tip region followed by nucleation of a brittle crack at carbides. Crack propagation in the UHC-1.3 C specimen occurred unstably and smooth crack growth behavior was observed in UHC-1.5 C. The difference in crack growth behavior was attributed to the elastic energy stored in the grips, which was higher for the UHC-1.3 C test than for the UHC-1.5 C test.

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Published

2001-04-30

How to Cite

Fernández-Vicente, A., Chao, J., Peñalba, F., Carsí, M., & Ruano, O. A. (2001). Fracture behavior of two ultrahigh carbon steels. Revista De Metalurgia, 37(2), 381–385. https://doi.org/10.3989/revmetalm.2001.v37.i2.501

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Issue

Vol. 37 No. 2 (2001)

Section

Articles

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